32 in underbust, 36 in bust
- Band
- 32
- Cup
- D
- Bust minus band
- 4 in
Bra sizing varies a lot by brand, body shape, and style. Treat this as a fitting starting point.
Bra Size Calculator
Use this free bra size calculator to estimate a US-style starting bra size from underbust and bust measurements in inches.
Research-backed assumptions Formula steps Examples included Private in-browser use
Formula steps
- Round the underbust up to the next even band size.
- Subtract the band size from the bust measurement.
- Map that difference to an approximate cup label.
How to use the bra size calculator
- Enter underbust and bust measurements in inches.
- Press Estimate bra size to see a starting US-style band and cup estimate.
- Use the result only as a fitting starting point because brand charts and styles vary.
- Try nearby sister sizes when the band or cup fit feels off.
Common uses
Get a quick starting size before checking brand charts.
Understand the difference between band size and cup difference.
Compare nearby sizes before trying bras on.
Avoid treating a single measurement as a final fit answer.
Examples
About 32D
About 34B
Starting size estimate
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Bra Size Calculator?
Use it when your task matches one of these common needs: Get a quick starting size before checking brand charts. Understand the difference between band size and cup difference. It works best when you already know the values, dates, units, or settings the page asks for.
What is the Bra Size Calculator doing with my inputs?
In plain language: The calculator rounds underbust up to an even band size, subtracts band size from bust size, and maps the difference to an approximate cup label. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What should I double-check before trusting the answer?
Bra sizing varies by brand, body shape, country, and style. Use this as a fitting starting point, not a guaranteed size. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.
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